Edge-dresser for lumber.



UNITED STATES PATENT OFFICE.

JOHN F. FINNEGAN, OF IGERNA, CALIFORNIA, ASSIGNOR OF ONE-HALF TO LOWELLY. OOGGINS, OF IGERNA, CALIFORNIA.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed March 3, 1904. Serial No. 196,411.

1'0 00M whom, it may concern.-

Be it known that 1, JOHN F. FINNEGAN, a citizen of the United States,residing at Igerna, in the county of Siskiyou and State of California,have invented certain new and useful Improvements in Edge-Dressers forLumber, of which the following is a specification.

My invention relates to the sawing of lumber, and particularly to thesawing of boards into narrower lengths, strips, or pieces in themanufacture of box stuif, &c.

When the wide board leaves the sawmill, it has a rough edge, which isobjectionable in this class of material; and the object of my inventionis to provide effective means for dressing off this rough edge. Attemptshave been made to accomplish this by combining with the gang of sawswhich produces the box stuff or similar material an edge-dressing saw;but as such saw is thin and elastic its employment has never beencompletely successful on account of the springing and chattering towhich it is subject, particularly where there are hard knots in theedge. Instead of such a saw I place upon thegang-saw arbor a rigid diskhaving transverse blades or knives which dress the edge and give it asmooth surface.

The accompanying drawings will afford a clear illustration of anembodiment of my invention.

Figure 1 is an elevation of a saw-arbor with a gang of two saws and myedge-dressing disk in position. Fig. 2 is a side view of said disk. Fig.3 is a broken side elevation showing a modification in the position ofthe dressingblades relatively to the disk which supports them.

The construction of gang-saws for sawing up boards into narrower lengthsbeing well known and the means for supporting and feeding such boards tothe saws being well known, I have not considered it necessary toillustrate these features, as they form no part of my invention. I have,however, shown a saw-arbor 1, supported in bearings 2 2 and having adrive-pulley 3. On this arbor are shown two saws 1 4:, which areillustrative of any number of such saws from one upwardly, according tocircumstances. Secured upon the arbor is a rigid disk 5, having areduced rim or flange 6 and a central perforated hub 7. The part 5 formsa smooth-surfaced offset from the disk and the hub 7 projects beyond it.

These parts are all cast solid, and in the manufacture I prefer to makesolid blank disks with minimum-sized central openings, which openingscan be enlarged according to various sizes of saw-arbors. Around theperiphery of the rim 5 is shrunk a steel band or ring 8, and foradditional security bolts 9 may pass through the external band andengage with the rim of the cast disk.

In the rim of the cast disk and extending through the same is a seriesof recesses, which are inclined relatively to the axis of the disk, andin these recesses and taking their inclination, as shown in Fig. 1, areknives, blades, or cutters 11, having chisel cutting edges, as shown.These blades are always inclined when looked at in plan view or front orrear elevation; but in side elevation they appear, preferably, as radialblades, as shown in Fig. 2. This is because a revolving radial bladeacting against the edge of the board with a circular sweep makes a drawcut,'which is more effective than a straight cut.- I do not, however,limit myself to the radial arrangement of Fig. 2 and, in fact, haveshown in Fig. 3 blades inclined to radii of the disk which can beemployed, if desired. The blades project just enough beyond the part 5to dress off the rough surface of the board,

and the plane flat surface of this part 5 forms an edge-guide for thelumber, while the hub forms a bottom rest for such lumber. As shown inFig. 2, the periphery of the part 5 is beveled, as shown at 10, so thatseats 14, which are co'ntinuations of said recesses, are formed in suchbevel which help to hold the blades without obstructing any part oftheir cutting edges. The blades are of such length as to extend entirelythrough and beyond the rim in which they are seated, as shown in Fig. 1,so as to allow a considerable range of adjustment as they become worn.It is a simple matter to set the worn blades up into proper positionfrom the rear, and such blades are easily removed for resharpening. Toprovide for this easy removal and replacement, the openings whichreceive the blades are made deep enough to receive keys 12, which bearon the blades between the latter and the exterior band 8. These keys arefixed against the outer edges of the blades by setscrews 13, which arethreaded through the exterior band, bear against the keys, and are heldby nuts 15.

In the operation of the de' vice the board is presented to the saw orsaws in the usual manner. The blades revolving at the high speed of thesaws and operating simultaneously with them dresses off the rough edgeand leaves it smooth and suitable for use as box stuff or other materialof that general character. The disk being perfectly rigid there is notendency to buckle or spring, as in the case of av thin saw, and at thehigh speed of rotation the presence of knots in the edge forms noobstruction and interferes in no Way With the effectiveness of thedevice.

Having thus described ,my invention, What I claim, and desire to secureby Letters Patent, is-

1. An edge-dressing device comprising a disk having a central projectinghub adapted to form a bottom restfor the lumber,a smoothsurfaced ofisetforming an edge-guide for such lumber, and blades extending through thedisk and slightly beyond the plane of said. ofiset.

2. An edgedressing device comprising a by seats are formed in said edge,and blades extending through the slots and seats.

In testimony whereof I have afiixed my signature, in presence of twoWitnesses, this 4th day of January, 1904:.

JOHN F. FIN NEGAN.

Witnesses:

J. H. MURPHEY, H. C. WVHI LY.

